Band-brake.



UNITED sTATEs PATENT oEEioE.

JACOB C. MUTTLDF MANSN, IOWA. I

BAND-BRAKE.

T o all Iwhom t may concern Be it known that I, JACOB C. MUTTna citizen of the UnitedStates, and resident of Manson, in the county of Calhoun and State of Iowa, have invented a certain new and useful Band-Brake, of which the following is a'specification.

vThe object of my invention is to provide a band brake of simple, durable and inexpen sive construction.' A further object is to provide a brake o ery 'such as dredges, 4ditcher's, excavating machinery and the like having controlling means whereby both ends of theb'and brake may be, simultaneously operated for loosenling or tightening the brake.

Still a .further object is to provide in such a brake means for automatically releasing means, said means being also adapted to guide, steady and-control the band brake.

My invention consists in the construction,

arrangement and combina..on of the various parts of the device whereby the objects contemplated are attained as hereinafter more fully set forth pointed out in `my claims. and

illustrated in lthe accompanying drawings, v

in which:

Figure l`shows a side elevation of a brake 'embodying my invention'.

Fig..2 shows a top or plan view ofthe operating mechanism, the resilient band and .drum not being shown, and Fig. 3 shows a vertical'sectional" View taken on the lline 3 3 of Fig. 2.

It is well known that where it is necessary l to have a band brake of large diameter that lordinarily only one end of the brake'is detachable, so .that even when the brake is loosened there is some friction between the band and the wheel or the like on which it travelsx I have built a-brakeboth ends of which are.

controlled for yreleasing the resilient band 'around its entire vcircumference when the brake is released.

In the exempliflcation of myinvention,

illustrated intheaccompanying drawings, I

have used the reference numeral `10 to 1ndicate generally a shaft upon which is mount-.

led a large drum -11,whichmaybe used for a variety of purposes on heavyl machinery.

At4 one end of the drum 11` is a .wheel'or engaged by therei forvaryin'gthe tensions of the springs 39, or

flange 12 adapted to'be silient band hereinafter referred to.

Specification of Letters Patent.`

the general type mentioned particularly adapted for use on large and heavy machinthan the gears 24 and 26.

.gears 25. and v26l as to of the members 29.

'gears 25and 26 are pins or shafts13l5, on

" Ward-ly outside the resilientband members 13 i Surrounding the wheel or iange l2 is a' resilient band preferably made in two parts Patented May 23, 1916. Application led Iune 15, 1915. Serial-No. 34,295. f i I 13 having at their upper portions the oppo- .I

site upward extensions 14 secured together by means of a. bolt 15 and a nut 1'6 and yieldingly held apart by a spring 17 mounted on the bolt 1 5 between the extensions 15.

Suitably mounted on theframe 18`of the large machine isa casting or support A, which -is preferably channel shaped having bottoml member 19 and spaced oppositev side members 20. Suitably 'mounted in bearings formed or mounted on the side membersf20, are three shafts 2l, 22 and 23 spaced apart from each other -as shown in the drawings. A

Mounted on the shaft 21 and fixed thereto is a comparatively wide -toothed gear wheel 24 in mesh with a similar toothed gear wheel 25 on the shaft 22.l The gear wheel 25 meshes with a similar gear wheel 26 on the shaft- 23. The gear 24 is The gears 25 and'26jare provided with slots 27 for the purpose hereinafter madel clear. Extending across. the slots 27 are pins or shafts 28, clearly shown-in Fig. 3. Mounted on the pins or shafts 28 are upwardly extending bars 29, on theupper ends of which are wider substantially flat meinpreferably smaller Y sof bers 30, to which the lower ends of the resilient band members 13 are bolted, as shown in` l.. vFigsl and 3. The outerend of the `sha-ft 21 is angular, f" as shown in Fig. 1, and on it is slidably mounted an arm 31. Pivoted to the arm 31 is link 32 which extends away from the casting A to a suitable point inthe machine for locating a foot lever 34, one end of which is pivotedto'said link 32, as shown in Figjl. The slots' 27 lare comparatively narrow, but are of such size'bircumferentially of the permit lsulficient play Mounted between'fthe walls- `or parts the and are -slidably' extended through'idetaoh-j ablebearings 37 l-on said band members. On-

the upper endsfof the rods 36, above the bearings 37 lare nuts .'38, whichcan be screwed to different positions-on the rods 36 meansof set screws 4l.

for vadjusting'the machine for limiting-.the

movementl of .the bandbrake. O n the" rods 36 below -thebe'arings 3 7 are collars 1(),.a`f-fliicli are fatachablyv mounted on the rods 36 by lars 40 and bearings 37are c oilA springsA 39. The pins or shafts 35 are so located and the coil springs 39 are of such kind-and .are so located as to force the gears 35 and .36 to -the position shown Ain Fig. 3 with the band `brake held upwardlyjand away from the Wheel or vflange 12. I For tightening the band brake,'the shaft 21is properly rotated as for instance by means of the foot'lever Bel-for ro- 15.

tating the gears and 26 toward 'each other,

thereby drawing the pins or shafts 28 doxvn. wa-rdly `and inwardly andf- -tightening the" band brake 12 on the wheel'orange 412 vagainst the pressure of the springs 39. The

'rods -36 during said movement slide np wardly and through the bearings and serve tosteady thebandfbrake and members 13,

and to hold them inlproper position,

. leased,l but isa'utomatically held in friction'al" engagement with the Wheel ori-lange 12. It will be understood that some changes v It will readily `be seenfthat upongreleas# ing the pressure of the lever 34, the springs 39 will' force the band brake members 11p-- .wardly and away from vtheflangeor wheel 12 and will tend to yrotate the gears 25'and 26 -over part of `a revolution, so that the band brake is not only automatically released when the vpressure of the foot lever-'"is remay be-made in the construction andarrangement of the parts of my improved band brake Without departing from its essential features'and purposes, and it is my intent to cover by this application any suchchanges Which'may be-included within the scope of my claims. A

I claim as my invention- 1. In .a band brake, the ,combination of a A rotating. member with a resilient. tvvo part band, :means for yieldingly connecting two adjacent'endsof the band together, .'a pair ofmeshingfgfears, thelother ends'of the band being.'p'ivot'ed:off center to the respective'l gears, a leverfmeans for operatively lconnecting said lever with one of .said gears, and yielding devices mounted on 'the respec- Between the col-- tive gears and 'operatively connected with opposite sides of the band.

@2..In a band brake', thecornbination of a rotating member withfa resilient twopart liand, ,nieans' for yielding'lyconnecting two adjacent endsof the band together, a pair of meshing gears having slots in their peripher-ies,A transverse shafft's mounted inpsaid gearsefxtending' across s'aidfslots, bars `piv oted' on said shafts extending awayfrom 'said gears, 'having fiat `upper portions to 'which Vthe other-ends of said band are se- 3. In device ofJthe"classdescribed,the

combination of' a rotating member with a b 'and brake* comprising a resilient band,..a pair of meshing-gears having slots in their peripheries, transverseshafts mounted in L said -gearsextending across said slots, -bars pivoted on said' shafts extending away from said gears, having. flat upper portions to `which the `said band is vsecured and means for rotating: one of said gears.

'4. In, a device ofthe class described, the

combination of -a rotating 4 meinber'with a band brake comprisingav resilient band, .a

pair of mes-hing gears, the ends of Isa'idband being pivoted off center to .the respective gears, a' third gear in meshvvith oneof said rodsltending to hold saidband awayiromf said rotating member,

' Des M'oinesIowa,June 8, 1915; 'JAjooB o. MUT- irri Witnessest v J. MAHER, A. SHERMAN.'

device of the class des cri bed,.thel

seif- `first gears, and a lever-operatively connected ,with said last gear for imparting vmoti-on ithereto. 

